gdb/f-lang.c

   1 /* Fortran language support routines for GDB, the GNU debugger.
   2    Copyright 1993, 1994, 1996, 2000 Free Software Foundation, Inc.
   3    Contributed by Motorola.  Adapted from the C parser by Farooq Butt
   4    (fmbutt@engage.sps.mot.com).
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #include "defs.h"
  24 #include "gdb_string.h"
  25 #include "symtab.h"
  26 #include "gdbtypes.h"
  27 #include "expression.h"
  28 #include "parser-defs.h"
  29 #include "language.h"
  30 #include "f-lang.h"
  31 #include "valprint.h"
  32
  33 /* The built-in types of F77.  FIXME: integer*4 is missing, plain
  34    logical is missing (builtin_type_logical is logical*4).  */
  35
  36 struct type *builtin_type_f_character;
  37 struct type *builtin_type_f_logical;
  38 struct type *builtin_type_f_logical_s1;
  39 struct type *builtin_type_f_logical_s2;
  40 struct type *builtin_type_f_integer;
  41 struct type *builtin_type_f_integer_s2;
  42 struct type *builtin_type_f_real;
  43 struct type *builtin_type_f_real_s8;
  44 struct type *builtin_type_f_real_s16;
  45 struct type *builtin_type_f_complex_s8;
  46 struct type *builtin_type_f_complex_s16;
  47 struct type *builtin_type_f_complex_s32;
  48 struct type *builtin_type_f_void;
  49
  50 /* Following is dubious stuff that had been in the xcoff reader. */
  51
  52 struct saved_fcn
  53   {
  54     long line_offset;           /* Line offset for function */
  55     struct saved_fcn *next;
  56   };
  57
  58
  59 struct saved_bf_symnum
  60   {
  61     long symnum_fcn;            /* Symnum of function (i.e. .function directive) */
  62     long symnum_bf;             /* Symnum of .bf for this function */
  63     struct saved_bf_symnum *next;
  64   };
  65
  66 typedef struct saved_fcn SAVED_FUNCTION, *SAVED_FUNCTION_PTR;
  67 typedef struct saved_bf_symnum SAVED_BF, *SAVED_BF_PTR;
  68
  69 /* Local functions */
  70
  71 extern void _initialize_f_language (void);
  72 #if 0
  73 static void clear_function_list (void);
  74 static long get_bf_for_fcn (long);
  75 static void clear_bf_list (void);
  76 static void patch_all_commons_by_name (char *, CORE_ADDR, int);
  77 static SAVED_F77_COMMON_PTR find_first_common_named (char *);
  78 static void add_common_entry (struct symbol *);
  79 static void add_common_block (char *, CORE_ADDR, int, char *);
  80 static SAVED_FUNCTION *allocate_saved_function_node (void);
  81 static SAVED_BF_PTR allocate_saved_bf_node (void);
  82 static COMMON_ENTRY_PTR allocate_common_entry_node (void);
  83 static SAVED_F77_COMMON_PTR allocate_saved_f77_common_node (void);
  84 static void patch_common_entries (SAVED_F77_COMMON_PTR, CORE_ADDR, int);
  85 #endif
  86
  87 static struct type *f_create_fundamental_type (struct objfile *, int);
  88 static void f_printstr (struct ui_file * stream, char *string,
  89                         unsigned int length, int width,
  90                         int force_ellipses);
  91 static void f_printchar (int c, struct ui_file * stream);
  92 static void f_emit_char (int c, struct ui_file * stream, int quoter);
  93
  94 /* Print the character C on STREAM as part of the contents of a literal
  95    string whose delimiter is QUOTER.  Note that that format for printing
  96    characters and strings is language specific.
  97    FIXME:  This is a copy of the same function from c-exp.y.  It should
  98    be replaced with a true F77 version.  */
  99
 100 static void
 101 f_emit_char (register int c, struct ui_file *stream, int quoter)
 102 {
 103   c &= 0xFF;                    /* Avoid sign bit follies */
 104
 105   if (PRINT_LITERAL_FORM (c))
 106     {
 107       if (c == '\\' || c == quoter)
 108         fputs_filtered ("\\", stream);
 109       fprintf_filtered (stream, "%c", c);
 110     }
 111   else
 112     {
 113       switch (c)
 114         {
 115         case '\n':
 116           fputs_filtered ("\\n", stream);
 117           break;
 118         case '\b':
 119           fputs_filtered ("\\b", stream);
 120           break;
 121         case '\t':
 122           fputs_filtered ("\\t", stream);
 123           break;
 124         case '\f':
 125           fputs_filtered ("\\f", stream);
 126           break;
 127         case '\r':
 128           fputs_filtered ("\\r", stream);
 129           break;
 130         case '\033':
 131           fputs_filtered ("\\e", stream);
 132           break;
 133         case '\007':
 134           fputs_filtered ("\\a", stream);
 135           break;
 136         default:
 137           fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
 138           break;
 139         }
 140     }
 141 }
 142
 143 /* FIXME:  This is a copy of the same function from c-exp.y.  It should
 144    be replaced with a true F77version. */
 145
 146 static void
 147 f_printchar (int c, struct ui_file *stream)
 148 {
 149   fputs_filtered ("'", stream);
 150   LA_EMIT_CHAR (c, stream, '\'');
 151   fputs_filtered ("'", stream);
 152 }
 153
 154 /* Print the character string STRING, printing at most LENGTH characters.
 155    Printing stops early if the number hits print_max; repeat counts
 156    are printed as appropriate.  Print ellipses at the end if we
 157    had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
 158    FIXME:  This is a copy of the same function from c-exp.y.  It should
 159    be replaced with a true F77 version. */
 160
 161 static void
 162 f_printstr (struct ui_file *stream, char *string, unsigned int length,
 163             int width, int force_ellipses)
 164 {
 165   register unsigned int i;
 166   unsigned int things_printed = 0;
 167   int in_quotes = 0;
 168   int need_comma = 0;
 169   extern int inspect_it;
 170
 171   if (length == 0)
 172     {
 173       fputs_filtered ("''", gdb_stdout);
 174       return;
 175     }
 176
 177   for (i = 0; i < length && things_printed < print_max; ++i)
 178     {
 179       /* Position of the character we are examining
 180          to see whether it is repeated.  */
 181       unsigned int rep1;
 182       /* Number of repetitions we have detected so far.  */
 183       unsigned int reps;
 184
 185       QUIT;
 186
 187       if (need_comma)
 188         {
 189           fputs_filtered (", ", stream);
 190           need_comma = 0;
 191         }
 192
 193       rep1 = i + 1;
 194       reps = 1;
 195       while (rep1 < length && string[rep1] == string[i])
 196         {
 197           ++rep1;
 198           ++reps;
 199         }
 200
 201       if (reps > repeat_count_threshold)
 202         {
 203           if (in_quotes)
 204             {
 205               if (inspect_it)
 206                 fputs_filtered ("\\', ", stream);
 207               else
 208                 fputs_filtered ("', ", stream);
 209               in_quotes = 0;
 210             }
 211           f_printchar (string[i], stream);
 212           fprintf_filtered (stream, " <repeats %u times>", reps);
 213           i = rep1 - 1;
 214           things_printed += repeat_count_threshold;
 215           need_comma = 1;
 216         }
 217       else
 218         {
 219           if (!in_quotes)
 220             {
 221               if (inspect_it)
 222                 fputs_filtered ("\\'", stream);
 223               else
 224                 fputs_filtered ("'", stream);
 225               in_quotes = 1;
 226             }
 227           LA_EMIT_CHAR (string[i], stream, '"');
 228           ++things_printed;
 229         }
 230     }
 231
 232   /* Terminate the quotes if necessary.  */
 233   if (in_quotes)
 234     {
 235       if (inspect_it)
 236         fputs_filtered ("\\'", stream);
 237       else
 238         fputs_filtered ("'", stream);
 239     }
 240
 241   if (force_ellipses || i < length)
 242     fputs_filtered ("...", stream);
 243 }
 244
 245 /* FIXME:  This is a copy of c_create_fundamental_type(), before
 246    all the non-C types were stripped from it.  Needs to be fixed
 247    by an experienced F77 programmer. */
 248
 249 static struct type *
 250 f_create_fundamental_type (struct objfile *objfile, int typeid)
 251 {
 252   register struct type *type = NULL;
 253
 254   switch (typeid)
 255     {
 256     case FT_VOID:
 257       type = init_type (TYPE_CODE_VOID,
 258                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 259                         0, "VOID", objfile);
 260       break;
 261     case FT_BOOLEAN:
 262       type = init_type (TYPE_CODE_BOOL,
 263                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 264                         TYPE_FLAG_UNSIGNED, "boolean", objfile);
 265       break;
 266     case FT_STRING:
 267       type = init_type (TYPE_CODE_STRING,
 268                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 269                         0, "string", objfile);
 270       break;
 271     case FT_CHAR:
 272       type = init_type (TYPE_CODE_INT,
 273                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 274                         0, "character", objfile);
 275       break;
 276     case FT_SIGNED_CHAR:
 277       type = init_type (TYPE_CODE_INT,
 278                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 279                         0, "integer*1", objfile);
 280       break;
 281     case FT_UNSIGNED_CHAR:
 282       type = init_type (TYPE_CODE_BOOL,
 283                         TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 284                         TYPE_FLAG_UNSIGNED, "logical*1", objfile);
 285       break;
 286     case FT_SHORT:
 287       type = init_type (TYPE_CODE_INT,
 288                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 289                         0, "integer*2", objfile);
 290       break;
 291     case FT_SIGNED_SHORT:
 292       type = init_type (TYPE_CODE_INT,
 293                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 294                         0, "short", objfile);   /* FIXME-fnf */
 295       break;
 296     case FT_UNSIGNED_SHORT:
 297       type = init_type (TYPE_CODE_BOOL,
 298                         TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 299                         TYPE_FLAG_UNSIGNED, "logical*2", objfile);
 300       break;
 301     case FT_INTEGER:
 302       type = init_type (TYPE_CODE_INT,
 303                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 304                         0, "integer*4", objfile);
 305       break;
 306     case FT_SIGNED_INTEGER:
 307       type = init_type (TYPE_CODE_INT,
 308                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 309                         0, "integer", objfile);         /* FIXME -fnf */
 310       break;
 311     case FT_UNSIGNED_INTEGER:
 312       type = init_type (TYPE_CODE_BOOL,
 313                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 314                         TYPE_FLAG_UNSIGNED, "logical*4", objfile);
 315       break;
 316     case FT_FIXED_DECIMAL:
 317       type = init_type (TYPE_CODE_INT,
 318                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 319                         0, "fixed decimal", objfile);
 320       break;
 321     case FT_LONG:
 322       type = init_type (TYPE_CODE_INT,
 323                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 324                         0, "long", objfile);
 325       break;
 326     case FT_SIGNED_LONG:
 327       type = init_type (TYPE_CODE_INT,
 328                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 329                         0, "long", objfile);    /* FIXME -fnf */
 330       break;
 331     case FT_UNSIGNED_LONG:
 332       type = init_type (TYPE_CODE_INT,
 333                         TARGET_LONG_BIT / TARGET_CHAR_BIT,
 334                         TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
 335       break;
 336     case FT_LONG_LONG:
 337       type = init_type (TYPE_CODE_INT,
 338                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 339                         0, "long long", objfile);
 340       break;
 341     case FT_SIGNED_LONG_LONG:
 342       type = init_type (TYPE_CODE_INT,
 343                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 344                         0, "signed long long", objfile);
 345       break;
 346     case FT_UNSIGNED_LONG_LONG:
 347       type = init_type (TYPE_CODE_INT,
 348                         TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
 349                         TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
 350       break;
 351     case FT_FLOAT:
 352       type = init_type (TYPE_CODE_FLT,
 353                         TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 354                         0, "real", objfile);
 355       break;
 356     case FT_DBL_PREC_FLOAT:
 357       type = init_type (TYPE_CODE_FLT,
 358                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 359                         0, "real*8", objfile);
 360       break;
 361     case FT_FLOAT_DECIMAL:
 362       type = init_type (TYPE_CODE_FLT,
 363                         TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 364                         0, "floating decimal", objfile);
 365       break;
 366     case FT_EXT_PREC_FLOAT:
 367       type = init_type (TYPE_CODE_FLT,
 368                         TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 369                         0, "real*16", objfile);
 370       break;
 371     case FT_COMPLEX:
 372       type = init_type (TYPE_CODE_COMPLEX,
 373                         2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 374                         0, "complex*8", objfile);
 375       TYPE_TARGET_TYPE (type) = builtin_type_f_real;
 376       break;
 377     case FT_DBL_PREC_COMPLEX:
 378       type = init_type (TYPE_CODE_COMPLEX,
 379                         2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 380                         0, "complex*16", objfile);
 381       TYPE_TARGET_TYPE (type) = builtin_type_f_real_s8;
 382       break;
 383     case FT_EXT_PREC_COMPLEX:
 384       type = init_type (TYPE_CODE_COMPLEX,
 385                         2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 386                         0, "complex*32", objfile);
 387       TYPE_TARGET_TYPE (type) = builtin_type_f_real_s16;
 388       break;
 389     default:
 390       /* FIXME:  For now, if we are asked to produce a type not in this
 391          language, create the equivalent of a C integer type with the
 392          name "<?type?>".  When all the dust settles from the type
 393          reconstruction work, this should probably become an error. */
 394       type = init_type (TYPE_CODE_INT,
 395                         TARGET_INT_BIT / TARGET_CHAR_BIT,
 396                         0, "<?type?>", objfile);
 397       warning ("internal error: no F77 fundamental type %d", typeid);
 398       break;
 399     }
 400   return (type);
 401 }
 402 \f
 403
 404 /* Table of operators and their precedences for printing expressions.  */
 405
 406 static const struct op_print f_op_print_tab[] =
 407 {
 408   {"+", BINOP_ADD, PREC_ADD, 0},
 409   {"+", UNOP_PLUS, PREC_PREFIX, 0},
 410   {"-", BINOP_SUB, PREC_ADD, 0},
 411   {"-", UNOP_NEG, PREC_PREFIX, 0},
 412   {"*", BINOP_MUL, PREC_MUL, 0},
 413   {"/", BINOP_DIV, PREC_MUL, 0},
 414   {"DIV", BINOP_INTDIV, PREC_MUL, 0},
 415   {"MOD", BINOP_REM, PREC_MUL, 0},
 416   {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
 417   {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
 418   {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
 419   {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
 420   {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
 421   {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
 422   {".LE.", BINOP_LEQ, PREC_ORDER, 0},
 423   {".GE.", BINOP_GEQ, PREC_ORDER, 0},
 424   {".GT.", BINOP_GTR, PREC_ORDER, 0},
 425   {".LT.", BINOP_LESS, PREC_ORDER, 0},
 426   {"**", UNOP_IND, PREC_PREFIX, 0},
 427   {"@", BINOP_REPEAT, PREC_REPEAT, 0},
 428   {NULL, 0, 0, 0}
 429 };
 430 \f
 431 struct type **CONST_PTR (f_builtin_types[]) =
 432 {
 433   &builtin_type_f_character,
 434     &builtin_type_f_logical,
 435     &builtin_type_f_logical_s1,
 436     &builtin_type_f_logical_s2,
 437     &builtin_type_f_integer,
 438     &builtin_type_f_integer_s2,
 439     &builtin_type_f_real,
 440     &builtin_type_f_real_s8,
 441     &builtin_type_f_real_s16,
 442     &builtin_type_f_complex_s8,
 443     &builtin_type_f_complex_s16,
 444 #if 0
 445     &builtin_type_f_complex_s32,
 446 #endif
 447     &builtin_type_f_void,
 448     0
 449 };
 450
 451 /* This is declared in c-lang.h but it is silly to import that file for what
 452    is already just a hack. */
 453 extern int c_value_print (struct value *, struct ui_file *, int,
 454                           enum val_prettyprint);
 455
 456 const struct language_defn f_language_defn =
 457 {
 458   "fortran",
 459   language_fortran,
 460   f_builtin_types,
 461   range_check_on,
 462   type_check_on,
 463   f_parse,                      /* parser */
 464   f_error,                      /* parser error function */
 465   evaluate_subexp_standard,
 466   f_printchar,                  /* Print character constant */
 467   f_printstr,                   /* function to print string constant */
 468   f_emit_char,                  /* Function to print a single character */
 469   f_create_fundamental_type,    /* Create fundamental type in this language */
 470   f_print_type,                 /* Print a type using appropriate syntax */
 471   f_val_print,                  /* Print a value using appropriate syntax */
 472   c_value_print,                /* FIXME */
 473   {"", "", "", ""},             /* Binary format info */
 474   {"0%o", "0", "o", ""},        /* Octal format info */
 475   {"%d", "", "d", ""},          /* Decimal format info */
 476   {"0x%x", "0x", "x", ""},      /* Hex format info */
 477   f_op_print_tab,               /* expression operators for printing */
 478   0,                            /* arrays are first-class (not c-style) */
 479   1,                            /* String lower bound */
 480   &builtin_type_f_character,    /* Type of string elements */
 481   LANG_MAGIC
 482 };
 483
 484 void
 485 _initialize_f_language (void)
 486 {
 487   builtin_type_f_void =
 488     init_type (TYPE_CODE_VOID, 1,
 489                0,
 490                "VOID", (struct objfile *) NULL);
 491
 492   builtin_type_f_character =
 493     init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 494                0,
 495                "character", (struct objfile *) NULL);
 496
 497   builtin_type_f_logical_s1 =
 498     init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 499                TYPE_FLAG_UNSIGNED,
 500                "logical*1", (struct objfile *) NULL);
 501
 502   builtin_type_f_integer_s2 =
 503     init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 504                0,
 505                "integer*2", (struct objfile *) NULL);
 506
 507   builtin_type_f_logical_s2 =
 508     init_type (TYPE_CODE_BOOL, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
 509                TYPE_FLAG_UNSIGNED,
 510                "logical*2", (struct objfile *) NULL);
 511
 512   builtin_type_f_integer =
 513     init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
 514                0,
 515                "integer", (struct objfile *) NULL);
 516
 517   builtin_type_f_logical =
 518     init_type (TYPE_CODE_BOOL, TARGET_INT_BIT / TARGET_CHAR_BIT,
 519                TYPE_FLAG_UNSIGNED,
 520                "logical*4", (struct objfile *) NULL);
 521
 522   builtin_type_f_real =
 523     init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 524                0,
 525                "real", (struct objfile *) NULL);
 526
 527   builtin_type_f_real_s8 =
 528     init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 529                0,
 530                "real*8", (struct objfile *) NULL);
 531
 532   builtin_type_f_real_s16 =
 533     init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 534                0,
 535                "real*16", (struct objfile *) NULL);
 536
 537   builtin_type_f_complex_s8 =
 538     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
 539                0,
 540                "complex*8", (struct objfile *) NULL);
 541   TYPE_TARGET_TYPE (builtin_type_f_complex_s8) = builtin_type_f_real;
 542
 543   builtin_type_f_complex_s16 =
 544     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
 545                0,
 546                "complex*16", (struct objfile *) NULL);
 547   TYPE_TARGET_TYPE (builtin_type_f_complex_s16) = builtin_type_f_real_s8;
 548
 549   /* We have a new size == 4 double floats for the
 550      complex*32 data type */
 551
 552   builtin_type_f_complex_s32 =
 553     init_type (TYPE_CODE_COMPLEX, 2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
 554                0,
 555                "complex*32", (struct objfile *) NULL);
 556   TYPE_TARGET_TYPE (builtin_type_f_complex_s32) = builtin_type_f_real_s16;
 557
 558   builtin_type_string =
 559     init_type (TYPE_CODE_STRING, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
 560                0,
 561                "character string", (struct objfile *) NULL);
 562
 563   add_language (&f_language_defn);
 564 }
 565
 566 #if 0
 567 static SAVED_BF_PTR
 568 allocate_saved_bf_node (void)
 569 {
 570   SAVED_BF_PTR new;
 571
 572   new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
 573   return (new);
 574 }
 575
 576 static SAVED_FUNCTION *
 577 allocate_saved_function_node (void)
 578 {
 579   SAVED_FUNCTION *new;
 580
 581   new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
 582   return (new);
 583 }
 584
 585 static SAVED_F77_COMMON_PTR
 586 allocate_saved_f77_common_node (void)
 587 {
 588   SAVED_F77_COMMON_PTR new;
 589
 590   new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
 591   return (new);
 592 }
 593
 594 static COMMON_ENTRY_PTR
 595 allocate_common_entry_node (void)
 596 {
 597   COMMON_ENTRY_PTR new;
 598
 599   new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
 600   return (new);
 601 }
 602 #endif
 603
 604 SAVED_F77_COMMON_PTR head_common_list = NULL;   /* Ptr to 1st saved COMMON  */
 605 SAVED_F77_COMMON_PTR tail_common_list = NULL;   /* Ptr to last saved COMMON  */
 606 SAVED_F77_COMMON_PTR current_common = NULL;     /* Ptr to current COMMON */
 607
 608 #if 0
 609 static SAVED_BF_PTR saved_bf_list = NULL;       /* Ptr to (.bf,function)
 610                                                    list */
 611 static SAVED_BF_PTR saved_bf_list_end = NULL;   /* Ptr to above list's end */
 612 static SAVED_BF_PTR current_head_bf_list = NULL;        /* Current head of above list
 613                                                          */
 614
 615 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
 616                                    in macros */
 617
 618 /* The following function simply enters a given common block onto
 619    the global common block chain */
 620
 621 static void
 622 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
 623 {
 624   SAVED_F77_COMMON_PTR tmp;
 625   char *c, *local_copy_func_stab;
 626
 627   /* If the COMMON block we are trying to add has a blank
 628      name (i.e. "#BLNK_COM") then we set it to __BLANK
 629      because the darn "#" character makes GDB's input
 630      parser have fits. */
 631
 632
 633   if (STREQ (name, BLANK_COMMON_NAME_ORIGINAL) ||
 634       STREQ (name, BLANK_COMMON_NAME_MF77))
 635     {
 636
 637       free (name);
 638       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 639       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 640     }
 641
 642   tmp = allocate_saved_f77_common_node ();
 643
 644   local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
 645   strcpy (local_copy_func_stab, func_stab);
 646
 647   tmp->name = xmalloc (strlen (name) + 1);
 648
 649   /* local_copy_func_stab is a stabstring, let us first extract the
 650      function name from the stab by NULLing out the ':' character. */
 651
 652
 653   c = NULL;
 654   c = strchr (local_copy_func_stab, ':');
 655
 656   if (c)
 657     *c = '\0';
 658   else
 659     error ("Malformed function STAB found in add_common_block()");
 660
 661
 662   tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
 663
 664   strcpy (tmp->owning_function, local_copy_func_stab);
 665
 666   strcpy (tmp->name, name);
 667   tmp->offset = offset;
 668   tmp->next = NULL;
 669   tmp->entries = NULL;
 670   tmp->secnum = secnum;
 671
 672   current_common = tmp;
 673
 674   if (head_common_list == NULL)
 675     {
 676       head_common_list = tail_common_list = tmp;
 677     }
 678   else
 679     {
 680       tail_common_list->next = tmp;
 681       tail_common_list = tmp;
 682     }
 683 }
 684 #endif
 685
 686 /* The following function simply enters a given common entry onto
 687    the "current_common" block that has been saved away. */
 688
 689 #if 0
 690 static void
 691 add_common_entry (struct symbol *entry_sym_ptr)
 692 {
 693   COMMON_ENTRY_PTR tmp;
 694
 695
 696
 697   /* The order of this list is important, since
 698      we expect the entries to appear in decl.
 699      order when we later issue "info common" calls */
 700
 701   tmp = allocate_common_entry_node ();
 702
 703   tmp->next = NULL;
 704   tmp->symbol = entry_sym_ptr;
 705
 706   if (current_common == NULL)
 707     error ("Attempt to add COMMON entry with no block open!");
 708   else
 709     {
 710       if (current_common->entries == NULL)
 711         {
 712           current_common->entries = tmp;
 713           current_common->end_of_entries = tmp;
 714         }
 715       else
 716         {
 717           current_common->end_of_entries->next = tmp;
 718           current_common->end_of_entries = tmp;
 719         }
 720     }
 721 }
 722 #endif
 723
 724 /* This routine finds the first encountred COMMON block named "name" */
 725
 726 #if 0
 727 static SAVED_F77_COMMON_PTR
 728 find_first_common_named (char *name)
 729 {
 730
 731   SAVED_F77_COMMON_PTR tmp;
 732
 733   tmp = head_common_list;
 734
 735   while (tmp != NULL)
 736     {
 737       if (STREQ (tmp->name, name))
 738         return (tmp);
 739       else
 740         tmp = tmp->next;
 741     }
 742   return (NULL);
 743 }
 744 #endif
 745
 746 /* This routine finds the first encountred COMMON block named "name"
 747    that belongs to function funcname */
 748
 749 SAVED_F77_COMMON_PTR
 750 find_common_for_function (char *name, char *funcname)
 751 {
 752
 753   SAVED_F77_COMMON_PTR tmp;
 754
 755   tmp = head_common_list;
 756
 757   while (tmp != NULL)
 758     {
 759       if (STREQ (tmp->name, name) && STREQ (tmp->owning_function, funcname))
 760         return (tmp);
 761       else
 762         tmp = tmp->next;
 763     }
 764   return (NULL);
 765 }
 766
 767
 768 #if 0
 769
 770 /* The following function is called to patch up the offsets
 771    for the statics contained in the COMMON block named
 772    "name."  */
 773
 774 static void
 775 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
 776 {
 777   COMMON_ENTRY_PTR entry;
 778
 779   blk->offset = offset;         /* Keep this around for future use. */
 780
 781   entry = blk->entries;
 782
 783   while (entry != NULL)
 784     {
 785       SYMBOL_VALUE (entry->symbol) += offset;
 786       SYMBOL_SECTION (entry->symbol) = secnum;
 787
 788       entry = entry->next;
 789     }
 790   blk->secnum = secnum;
 791 }
 792
 793 /* Patch all commons named "name" that need patching.Since COMMON
 794    blocks occur with relative infrequency, we simply do a linear scan on
 795    the name.  Eventually, the best way to do this will be a
 796    hashed-lookup.  Secnum is the section number for the .bss section
 797    (which is where common data lives). */
 798
 799 static void
 800 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
 801 {
 802
 803   SAVED_F77_COMMON_PTR tmp;
 804
 805   /* For blank common blocks, change the canonical reprsentation
 806      of a blank name */
 807
 808   if ((STREQ (name, BLANK_COMMON_NAME_ORIGINAL)) ||
 809       (STREQ (name, BLANK_COMMON_NAME_MF77)))
 810     {
 811       free (name);
 812       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 813       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 814     }
 815
 816   tmp = head_common_list;
 817
 818   while (tmp != NULL)
 819     {
 820       if (COMMON_NEEDS_PATCHING (tmp))
 821         if (STREQ (tmp->name, name))
 822           patch_common_entries (tmp, offset, secnum);
 823
 824       tmp = tmp->next;
 825     }
 826 }
 827 #endif
 828
 829 /* This macro adds the symbol-number for the start of the function
 830    (the symbol number of the .bf) referenced by symnum_fcn to a
 831    list.  This list, in reality should be a FIFO queue but since
 832    #line pragmas sometimes cause line ranges to get messed up
 833    we simply create a linear list.  This list can then be searched
 834    first by a queueing algorithm and upon failure fall back to
 835    a linear scan. */
 836
 837 #if 0
 838 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 839   \
 840   if (saved_bf_list == NULL) \
 841 { \
 842     tmp_bf_ptr = allocate_saved_bf_node(); \
 843       \
 844         tmp_bf_ptr->symnum_bf = (bf_sym); \
 845           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 846             tmp_bf_ptr->next = NULL; \
 847               \
 848                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 849                   saved_bf_list_end = tmp_bf_ptr; \
 850                   } \
 851 else \
 852 {  \
 853      tmp_bf_ptr = allocate_saved_bf_node(); \
 854        \
 855          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 856            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 857              tmp_bf_ptr->next = NULL;  \
 858                \
 859                  saved_bf_list_end->next = tmp_bf_ptr;  \
 860                    saved_bf_list_end = tmp_bf_ptr; \
 861                    }
 862 #endif
 863
 864 /* This function frees the entire (.bf,function) list */
 865
 866 #if 0
 867 static void
 868 clear_bf_list (void)
 869 {
 870
 871   SAVED_BF_PTR tmp = saved_bf_list;
 872   SAVED_BF_PTR next = NULL;
 873
 874   while (tmp != NULL)
 875     {
 876       next = tmp->next;
 877       free (tmp);
 878       tmp = next;
 879     }
 880   saved_bf_list = NULL;
 881 }
 882 #endif
 883
 884 int global_remote_debug;
 885
 886 #if 0
 887
 888 static long
 889 get_bf_for_fcn (long the_function)
 890 {
 891   SAVED_BF_PTR tmp;
 892   int nprobes = 0;
 893
 894   /* First use a simple queuing algorithm (i.e. look and see if the
 895      item at the head of the queue is the one you want)  */
 896
 897   if (saved_bf_list == NULL)
 898     internal_error ("cannot get .bf node off empty list");
 899
 900   if (current_head_bf_list != NULL)
 901     if (current_head_bf_list->symnum_fcn == the_function)
 902       {
 903         if (global_remote_debug)
 904           fprintf (stderr, "*");
 905
 906         tmp = current_head_bf_list;
 907         current_head_bf_list = current_head_bf_list->next;
 908         return (tmp->symnum_bf);
 909       }
 910
 911   /* If the above did not work (probably because #line directives were
 912      used in the sourcefile and they messed up our internal tables) we now do
 913      the ugly linear scan */
 914
 915   if (global_remote_debug)
 916     fprintf (stderr, "\ndefaulting to linear scan\n");
 917
 918   nprobes = 0;
 919   tmp = saved_bf_list;
 920   while (tmp != NULL)
 921     {
 922       nprobes++;
 923       if (tmp->symnum_fcn == the_function)
 924         {
 925           if (global_remote_debug)
 926             fprintf (stderr, "Found in %d probes\n", nprobes);
 927           current_head_bf_list = tmp->next;
 928           return (tmp->symnum_bf);
 929         }
 930       tmp = tmp->next;
 931     }
 932
 933   return (-1);
 934 }
 935
 936 static SAVED_FUNCTION_PTR saved_function_list = NULL;
 937 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
 938
 939 static void
 940 clear_function_list (void)
 941 {
 942   SAVED_FUNCTION_PTR tmp = saved_function_list;
 943   SAVED_FUNCTION_PTR next = NULL;
 944
 945   while (tmp != NULL)
 946     {
 947       next = tmp->next;
 948       free (tmp);
 949       tmp = next;
 950     }
 951
 952   saved_function_list = NULL;
 953 }
 954 #endif